8
9
5
3
5
7
8
4
5
6
8
2
3
9
5
8
1
8
4
6
1
9
2
7
5
3
1
5
7
8
8
5
6
7
2
9
2
7
3
8
1
5
6
4

This Sudoku Puzzle has 46 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Single, Locked Candidates Type 2 (Claiming), Naked Pair, Uniqueness Test 1, Full House, Skyscraper, Naked Triple techniques.

Naked Single Explanation
Hidden Single Explanation
Locked Candidates Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 6 / Column 5 → 8 (Hidden Single)
  2. Row 5 / Column 6 → 5 (Hidden Single)
  3. Locked Candidates Type 1 (Pointing): 6 in b2 => r1c23<>6
  4. Locked Candidates Type 1 (Pointing): 7 in b4 => r1c3<>7
  5. Row 1 / Column 3 → 2 (Naked Single)
  6. Row 2 / Column 5 → 2 (Hidden Single)
  7. Locked Candidates Type 2 (Claiming): 6 in c1 => r5c3,r6c2<>6
  8. Naked Pair: 1,4 in r2c6,r3c5 => r1c46<>1
  9. Uniqueness Test 1: 1/7 in r1c28,r2c28 => r2c2<>1, r2c2<>7
  10. Row 2 / Column 8 → 7 (Hidden Single)
  11. Row 1 / Column 8 → 1 (Full House)
  12. Row 1 / Column 2 → 7 (Naked Single)
  13. Row 2 / Column 6 → 1 (Hidden Single)
  14. Row 3 / Column 5 → 4 (Naked Single)
  15. Row 3 / Column 3 → 6 (Naked Single)
  16. Row 3 / Column 2 → 1 (Full House)
  17. Row 5 / Column 5 → 7 (Naked Single)
  18. Row 7 / Column 2 → 6 (Hidden Single)
  19. Row 4 / Column 3 → 7 (Hidden Single)
  20. Skyscraper: 3 in r4c6,r5c3 (connected by r7c36) => r4c1,r5c4<>3
  21. Naked Triple: 4,6,9 in r158c4 => r469c4<>9, r6c4<>4, r6c4<>6
  22. Row 6 / Column 4 → 2 (Naked Single)
  23. Row 4 / Column 1 → 2 (Hidden Single)
  24. Row 8 / Column 2 → 2 (Hidden Single)
  25. Locked Candidates Type 1 (Pointing): 9 in b4 => r6c6<>9
  26. Skyscraper: 4 in r7c3,r8c4 (connected by r5c34) => r7c6,r8c1<>4
  27. Row 7 / Column 6 → 3 (Naked Single)
  28. Row 7 / Column 3 → 4 (Full House)
  29. Row 5 / Column 3 → 3 (Full House)
  30. Row 8 / Column 1 → 9 (Naked Single)
  31. Row 8 / Column 4 → 4 (Full House)
  32. Row 9 / Column 2 → 3 (Full House)
  33. Row 4 / Column 6 → 9 (Naked Single)
  34. Row 9 / Column 4 → 1 (Naked Single)
  35. Row 9 / Column 5 → 9 (Full House)
  36. Row 4 / Column 5 → 1 (Full House)
  37. Row 4 / Column 4 → 3 (Full House)
  38. Row 5 / Column 4 → 6 (Naked Single)
  39. Row 1 / Column 4 → 9 (Full House)
  40. Row 1 / Column 6 → 6 (Full House)
  41. Row 5 / Column 1 → 4 (Full House)
  42. Row 6 / Column 6 → 4 (Full House)
  43. Row 2 / Column 2 → 4 (Naked Single)
  44. Row 2 / Column 1 → 3 (Full House)
  45. Row 6 / Column 1 → 6 (Full House)
  46. Row 6 / Column 2 → 9 (Full House)
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